Packaging box sheet

ABSTRACT

To provide a packaging box sheet which can be transported and stored without taking up space and can easily be assembled during use to obtain a Hari-bako that has excellent appearance. A packaging box sheet assembled to obtain a Hari-bako includes a base paper and a decorative paper. The base paper includes a first lateral plate and a second lateral plate each of which has an outer edge each having a rectangular shape, etc. in a plan view, and at least a third lateral plate which has an outer edge having a rectangular shape in a plan view and which is disposed between the first lateral plate and the second lateral plate. The decorative paper includes: a first portion which is pre-bonded to the first lateral plate and the third lateral plate; a second portion which corresponds to the second lateral plate, is continuous with the first portion, and has at least a part that is separated from the second lateral plate without being bonded thereto; and a flap portion which is continuous with the first portion and which is provided so as to be projected from the first portion to a side opposite to the second portion. At least the part of the second portion and the flap portion each includes an adhesive layer and a release paper.

TECHNICAL FIELD

The present invention relates to a packaging box sheet that can be assembled into a Hari-bako.

BACKGROUND ART

For example, a Hari-bako is known as a packaging box suitable for storing items such as confectionery, tea, etc. and gift items. Conventionally, in the case of delivering such Hari-bakos, since these Hari-bakos are delivered to the delivery destination in an assembled state, there is a disadvantage that the delivery cost tends to be expensive because more space is required compared with its weight. Further, for the party receiving these Hari-bakos, there is a disadvantage that extensive space is required for storing the Hari-bakos.

With respect to the disadvantages described above, for example, Japanese Unexamined Patent Application Publication No. H07-061441 (Patent Document 1) discloses a technique where a Hari-bako is flattened by cutting the four corners of the lateral plates of the once assembled Hari-bako to reduce the volume of the Hari-bako at the time of transportation and storage, and then the four cut corners of the flattened Hari-bako are bonded with an adhesive to restore the original form at the time of use.

PRIOR ART DOCUMENT Patent Document

Patent Document 1:Japanese Unexamined Patent Application Publication No. H07-061441

SUMMARY OF THE INVENTION Problem to be Solved by the Invention

However, for the shop clerk in a store or the like who uses a Hari-bako to bond again the once cut Hari-bako with an adhesive during sales operation is a heavy burden. Further, the Hari-bako formed in this way is likely to result in a deteriorated aesthetic appearance compared to the Hari-bako which has not been cut, due to protrusion, etc. of the adhesive. Moreover, when food such as confectionery is boxed in the Hari-bako, there is a possibility that the adhesive is exposed on the inner side of the Hari-bako and contacts the confectionery, etc. Therefore, from these viewpoints, improvement is desired. Further, it is difficult for the technique described in the above-described Patent Document 1 to cope with a tubular Hari-bako.

In a specific aspect, it is an object of the present invention to provide a packaging box sheet which can be transported and stored without taking up space, and can easily be assembled during use to obtain a Hari-bako that is excellent in aesthetic appearance.

Means for Solving the Problem

A packaging box sheet according to one aspect of the present invention is a packaging box sheet assembled to obtain a Hari-bako including: (a) a sheet-like base paper; and (b) a decorative paper disposed on an outer surface of the base paper; (c) where the base paper includes: (c1) a first lateral plate and a second lateral plate each of which has an outer edge each having a quadrangular shape in a plan view; and (c2) at least a third lateral plate which has an outer edge having a quadrangular shape in a plan view and which is disposed between the first lateral plate and the second lateral plate; (d) where the decorative paper includes: (d1) a first portion which is pre-bonded to the first lateral plate and the third lateral plate; (d2) a second portion which corresponds to the second lateral plate, is continuous with the first portion, and has at least a part that is separated from the second lateral plate without being bonded thereto; and (d3) a flap portion which is continuous with the first portion and which is provided so as to be projected from the first portion to a side opposite to the second portion; and where (e) at least the part of the second portion and the flap portion each includes: (e1) an adhesive layer; and (e2) a release paper covering the adhesive layer.

According to the above configuration, it is possible to provide a packaging box sheet which can be transported and stored without taking up space, and can easily be assembled during use to obtain a Hari-bako that is excellent in aesthetic appearance.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a packaging box sheet.

FIGS. 2A and 2B are perspective views of a Hari-bako after a packaging box sheet is being assembled.

FIG. 3 is a cross-sectional view of the lateral plate portion of the packaging box sheet.

FIGS. 4A to 4C are perspective views for explaining the method of assembling a packaging box sheet.

FIGS. 5A and 5B are perspective views of the first modified example of a packaging box sheet.

FIGS. 6A and 6B are perspective views of the second modified example of a packaging box sheet and a Hari-bako.

FIGS. 7A and 7B are perspective views of the third modified example of a packaging box sheet and a Hari-bako.

FIG. 8 is a perspective view of the fourth modified example of a packaging box sheet.

FIG. 9 is a perspective view of the fourth modified example of a packaging box sheet.

FIGS. 10A to 10C are perspective views for explaining the method of assembling the fourth modified example of a packaging box sheet.

FIG. 11 is a perspective view of the fifth modified example of a packaging box sheet.

FIGS. 12A and 12B are perspective views of the sixth modified example of a packaging box sheet.

FIG. 13 is a perspective view of the seventh modified example of a packaging box sheet.

FIGS. 14A and 14B are perspective views of the eighth modified example of a packaging box sheet.

MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a perspective view of a packaging box sheet 1 according to one embodiment, and the figure shows a perspective view of a packaging box sheet 1 when viewed from a base paper 10 side. The illustrated packaging box sheet 1 includes a base paper 10 which becomes a core material and a sheet-like decorative paper 20 disposed so as to overlap the entire outer surface of the base paper 10.

As shown in the perspective view in FIG. 2A, the packaging box sheet 1 can be assembled into a tubular Hari-bako 100. This tubular Hari-bako 100, as shown in FIG. 2B, for example, can be used by inserting a separate box 200 into the inside surrounded by the base paper 10. The illustrated separate box 200 has an opening at the top and a bottom plate at the bottom so that an arbitrary object can be placed inside.

The base paper 10 is made of, for example, a paperboard having a thickness of about 0.5 mm to several millimeters. The base paper 10 includes a lateral plate 11 a (a first lateral plate), a lateral plate lib (a second lateral plate), and lateral plates 11 c, 11 d (third lateral plates), each having a rectangular shaped outer edge in a plan view.

In the lateral plate 11 a, one of the two long sides is connected to one long side of the adjacent lateral plate 11 c, and nothing is connected to the other long side. In the lateral plate 11 b, one of the two long sides is connected to one long side of the adjacent lateral plate lid, and nothing is connected to the other long side.

In the lateral plate 11 c, one of the two long sides is connected to one long side of the adjacent lateral plate 11 a, and the other long side is connected to one long side of the adjacent lateral plate lid. In the lateral plate lid, one of the two long sides is connected to one long side of the adjacent lateral plate lib, and the other long side is connected to one long side of the adjacent lateral plate 11 c.

The four lateral plates 11 a to 11 d in the present embodiment are, when assembled, arranged so that the lateral plate 11 a and the lateral plate 11 d face each other and the lateral plate 11 b and the lateral plate 11 c face each other (refer to FIG. 2A). Further, each of the lateral plates 11 a to 11 d has one surface (front surface or back surface) having the same area and substantially the same shape.

Notch grooves 13 are portions where adjacent ones of the lateral plates 11 a to 11 d are connected to each other, and is provided linearly on the inner surface side after assembling the packaging box sheet 1. Each notch groove 13 is formed, for example, in a V-shaped cross section, to facilitate inward bending of each of the lateral plate 11 a, etc. Here, each notch groove 13 may be provided on the outer surface of the lateral plate 11 a, etc. when assembled. By providing notch groove 13 on the long side connecting each of the lateral plates 11 a to 11 d, bending of the adjacent lateral plates is facilitated.

The decorative paper 20 covers and decorates the entire outer surface of the base paper 10 and the edges of the opening after the packaging box sheet 1 is assembled into the Hari-bako (refer to FIG. 2A). Further, the decorative paper 20 has a portion for connecting the lateral plate 11 a and the lateral plate 11 b at their respective ends (one long side of each). This decorative paper 20 has arbitrary designs and patterns on the outer surface of the packaging box sheet 1 when assembled into the Hari-bako. The outer surface of the decorative paper 20 may be plain in any color.

In the present embodiment, the decorative paper 20 is preliminarily aligned and bonded to the first portion 20 a facing the outer surface of each of the lateral plates 11 a, 11 c, and 11 d. On the other hand, the decorative paper 20 is not preliminarily bonded to the second portion 20 b corresponding to the lateral plate lib, and the second portion 20 b is separated from the lateral plate lib. Therefore, in the state prior to assembly, the lateral plate 11 b can be freely bent around the notch groove 13 in a state of being separated and independent from the decorative paper 20 (refer to FIG. 1).

As shown in a partial cross-sectional view in FIG. 3, in the second portion 20 b corresponding to the lateral plate 11 b of the decorative paper 20, an adhesive layer 30 and a release paper 31 covering the adhesive layer 30 are provided. When assembling the Hari-bako, the release paper 31 provided on the second portion 20 b corresponding to the lateral plate 11 b is peeled off, and the adhesive layer 30 of the second portion 20 b is brought into contact with the outer surface of the lateral plate lib. Thereby, the second portion 20 b of the decorative paper 20 can be easily bonded to the lateral plate lib. At this time, since the second portion 20 b corresponding to the lateral plate 11 b of the decorative paper 20 is connected in advance to the first portion 20 a of the decorative paper 20 in the vicinity of the side where the notch groove 13 is provided and is in a state where its relative position is aligned with the side plate lid, it is unlikely to cause misalignment when bonded to the lateral plate lib.

The decorative paper 20 has a flap portion 21 which is provided extending outwardly from one long side of the lateral plate 11 a, specifically the long side not connected to the other lateral plates. The flap portion 21 is a portion for connecting the lateral plate 11 a and the lateral plate 11 b when assembling the Hari-bako 100. As shown in FIG. 1, the flap portion 21 is connected to the first portion 20 a corresponding to the lateral plate 11 a of the decorative paper 20, and is provided extending away from one side (long side) of the lateral plate 11 a in a direction away from this side (toward the opposite side of the second portion 20 b).

The flap portion 21 has, for example, a trapezoidal outer edge as shown in the figure, the bottom of which is formed about the same length as the lateral edge of the lateral plate 11 a, and is disposed in association with this lateral edge. Of the surface of the flap portion 21, on the same side as the side on which the adhesive layer 30 is provided on the decorative paper 20, as with the second portion 20 b, the adhesive layer 30 and the release paper 31 covering it are provided (refer to FIG. 3). When assembling the Hari-bako 100, the release paper 31 of the flap portion 21 is peeled off, then while the edges of the long sides of the lateral plate 11 a and the lateral plate 11 b are brought in contact with each other, by bonding the flap portion 21 to the outer surface of the lateral plate 11 b, the lateral plate 11 a and the lateral plate 11 b can be connected. Thereby, the packaging box sheet 1 can be easily assembled. Therefore, the flap portion 21 has a sufficient width (for example, about 1 cm) needed to connect the lateral plates to each other.

Further, the decorative paper 20 has two folding pieces 22 for folding inward and covering the inside of the lateral plate 11 b. These folding pieces 22 have approximately the same length as the edge portion of the lateral plate 11 b, and have a predetermined width (for example, about 1 cm) necessary and sufficient to fold inwardly, and as shown in FIG. 1, the folding pieces 22 are connected to the second portion 20 b corresponding to the lateral plate 11 b of the decorative paper 20, and is provided so as to project from each short side of the second portion 20 b in a direction away from these short sides.

Of the surfaces of each folding piece 22, on the same side as the side on which the adhesive layer 30 is provided on the decorative paper 20, the adhesive layer 30 and the release paper 32 covering the adhesive layer 30 are provided. In the present embodiment, the release paper 32 provided on the folding piece 22 of the decorative paper 20 and the release paper 31 provided on the second portion 20 b are integrally provided. When assembling the Hari-bako 100, by peeling off the release papers 31 and 32 provided integrally over each folding piece 22 and the second portion 20 b, then bonding the second portion 20 b to the lateral plate 11 b and folding inwardly each folding piece 22 to the lateral plate 11 b, the folding pieces 22 can be bonded to the inner side of the lateral plate 11 b.

Here, as shown in FIG. 1, similar folding pieces 22 are provided for the other lateral plates 11 a, 11 c, and 11 d, and these are preliminarily folded inwardly and bonded to the inner side of each of the lateral plates 11 a, etc. Due to these folding pieces 22, since the portion from the edge to the part of inner surface of each of the lateral plates 11 a to 11 d of the base paper 10 can be decorated with the decorative paper 20, the aesthetic appearance of the edge portion of each lateral plate can be improved (refer to FIG. 2A).

The packaging box sheet 1 of the present embodiment has the above-described configuration, and the assembly procedure will now be described with reference to FIGS. 4A to 4C. The procedure shown below is one example, and each procedure can be interchanged as long as there is no contradiction in its assembly.

First, from a flat state of the packaging box sheet 1 as shown in FIG. 1, as shown in FIG. 4A, each of the lateral plates 11 a, 11 b, 11 c, and 11 d is bent approximately 90 degrees along the notch groove 13 so that each of the lateral Plates 11 a to 11 d are arranged to form a ring. In this state, the release paper 31 of the flap portion 21 is peeled off, then while the long sides of the lateral plate 11 a and the lateral plate 11 b are brought in contact with each other, the flap portion 21 is bonded to the outer surface of the lateral plate 11 b. Thereby, the lateral plates 11 a and 11 b are connected to each other, and the lateral plates 11 a to 11 d become tubular as a whole.

Next, as shown in FIG. 4B, the second portion 20 b corresponding to the lateral plate 11 b of the decorative paper 20 and the release papers 31 and 32 corresponding to the two folding pieces 22 are peeled off, and the second portion 20 b of the decorative paper 20 is bonded to the outer surface of the lateral plate 11 b. Thereby, the flap portion 21 is covered by the second portion 20 b. Thereafter, as shown in FIG. 4C, each folding piece 22 is folded inwardly inside the lateral plate 11 b and bonded to the inner surface of the lateral plate 11 b. From the above, the Hari-bako 100 as shown in FIG. 2A is completed.

According to the packaging box sheet 1 of the above embodiment, since the box sheet is in the form of a sheet prior to assembly, the packaging box sheet can be transported to the delivery destination in a space-saving manner and at low cost. In addition, less storage space is required at the delivery destination, and when the Hari-bako is needed, the Hari-bako (the packaging box) can be easily assembled into an aesthetically pleasing tubular shape without any special skills or dexterity on the part of the assembler.

In detail, since the lateral plates 11 a, 11 c, and 11 d are pre-bonded to the decorative paper 20, the decorative paper 20 is less likely to be misaligned when assembled at a site such as a confectionery store. Further, since the lateral plate 11 b and the decorative paper 20 are not pre-bonded, after connecting the lateral plate 11 a and the lateral plate 11 b with the flap portion 21, by bonding the second portion 20 b of the decorative paper 20 to the lateral plate 11 b so as to cover the flap portion 21, the flap portion 21 can be made invisible from the outside. As a result, the aesthetic appearance of the Hari-bako 100 is improved.

Here, the present invention is not limited to the content of the above-described embodiment, and can be variously modified and implemented within the scope of the subject matter of the present invention. For example, each folding piece 22 may be omitted from the packaging box sheet 1 of the above-described embodiment. Further, the plan view shape (the outer edge shape) of each of the lateral plates 11 a to 11 d is not limited to a rectangular shape, and may be a square shape. The plan view shape (the outer edge shape) of each of the lateral plates 11 a to 11 d may be a variety of quadrangles, each of which may have a different plan view shape.

Further, in the above-described embodiment, the decorative paper 20 is pre-bonded to the lateral plates 11 a, 11 c, 11 d, but the present invention is not limited thereto, and it is sufficient that the decorative paper 20 is preliminarily aligned and bonded to at least one of the lateral plates 11 c or 11 d. In this case, with regard to the lateral plate that is not bonded to the decorative paper 20, it is preferable to provide the adhesive layer and the release paper as in the above-described embodiment.

One such modified example is shown in FIGS. 5A and 5B. In the packaging box sheet 1 a of the modified example shown in FIG. 5A, the lateral plates 11 c and 11 d and the decorative paper 20 are pre-bonded, but the lateral plate 11 a is not pre-bonded. This point is different from the packaging box sheet 1 of the above-described embodiment. Specifically, the lateral plate 11 a is connected to the lateral plate 11 c, and is provided flexibly as with the lateral plate lib. Further, the first portion 20 a corresponding to the lateral plate 11 a of the decorative paper 20 and each folding piece 22 are provided with an adhesive layer (not shown in the figure) and the release papers 32 and 33 covering the adhesive layer. In the illustrated example, the release paper 33 is provided integrally with the release paper 31 of the flap portion 21 and the release papers 32 of each folding piece 22, but these may be provided separately. Here, in this modified example, the portion of the decorative paper 20 that is pre-bonded to the lateral plates 11 c and 11 d corresponds to the third portion. This portion is connected to the first portion 20 a and the second portion 20 b of the decorative paper 20. Here, the configurations other than the above are the same as those in the above-described embodiment, and the same components are designated by the same reference numerals and detailed description thereof will be omitted (the same applies to other modified examples described below).

In the modified example of the packaging box sheet 1 a shown in FIG. 5A, at the time of assembly, firstly, the release papers 32 and 33 are peeled off, then the first portion 20 a of the decorative paper 20 is bonded to the lateral plate 11 a, and each folding piece 22 is also bonded to the lateral plate 11 a. In the present example, the release paper 31 is also peeled off at the same time. Thereafter, the packaging box sheet can be assembled in the same manner as the above-described embodiment (refer to FIGS. 4A to 4C).

Further, as in the packaging box sheet 1 a′ of the modified example shown in FIG. 5B, it is also possible to have only the lateral plate 11 c pre-bonded to the decorative paper 20, and not have the lateral plate 11 d pre-bonded thereto. In this case, the release papers 32 and 33 (and the adhesive layer not shown) are also provided onto the portion corresponding to the lateral plate 11 d of the decorative paper 20. Instead, the lateral plate 11 d may be pre-bonded to the decorative paper 20 and not have the the lateral plate 11 c pre-bonded thereto.

In the modified example of the packaging box sheet 1 a′ shown in FIG. 5B, at the time of assembly, firstly, the release papers 32 and 33 are peeled off, then the first portion 20 a of the decorative paper 20 is bonded to the lateral plate 11 a, and each folding piece 22 is also bonded to the lateral plate 11 a. In addition, with regard to the portion corresponding to the lateral plate 11 d of the decorative paper 20, the release papers 32 and 33 are peeled off to be bonded to the lateral plate 11 d. Thereafter, the packaging box sheet can be assembled in the same manner as the above-described embodiment (refer to FIGS. 4A to 4C).

Further, although the above-described embodiment illustrates the packaging box sheet to obtain the Hari-bako 100 in the form of a cylinder with a quadrangular cross section, the cross-sectional shape of the Hari-bako is not limited thereto, and by increasing or decreasing the number of lateral plates as necessary, the Hari-bako can be variously modified. One such modified example is shown in FIG. 6A. The packaging box sheet 1 b of the modified example shown in FIG. 6A is different in that the lateral plate 11 d in the packaging box sheet 1 of the above-described embodiment is omitted, and the lateral plate 11 b and the lateral plate 11 c are connected at each long side. Here, as with the modified example shown in FIG. 5A, the lateral plate 11 a may be configured not to be pre-bonded.

By assembling such packaging box sheet 1 b in the same manner as described above, a tubular Hari-bako 100 b having a triangular cross-sectional shape as shown in FIG. 6B can be obtained. Here, by increasing the number of the lateral plates arranged between the lateral plate 11 a and the lateral plate 11 b in the same manner, it is possible to realize a packaging box sheet capable of obtaining a tubular Hari-bako having various polygonal cross-sectional shapes.

Further, in the above-described embodiment, the size and shape of each of the lateral plates have been the same, but by making them different, it is possible to realize a packaging box sheet capable of obtaining a tubular Hari-bako having various polygonal cross-sectional shapes. One such modified example is shown in FIG. 7A. The packaging box sheet 1 c of the modified example shown in FIG. 7A includes eight lateral plates 111 a, 111 b, 111 c, 111 d, 111 e, 111 f, 111 g, and 111 h, provided in connection with each other. Of these, the lateral plate 111 a corresponds to the lateral plate 11 a in the above-described embodiment. And the flap portion 121 and the release paper 131 (and an adhesive layer not shown) covering the flap portion 121 are provided in association with the lateral plate 111 a.

Further, the lateral plate 111 b corresponds to the lateral plate 11 b in the above-described embodiment. Then, in association with the lateral plate 111 b, the second portion 120 b, the release paper 131 (and the adhesive layer not shown) covering the second portion 120 b, two folding pieces 122 and the release paper 132 (and the adhesive layer not shown) covering them are provided. The other lateral plates 111 c, etc. correspond to the lateral plates 11 c and 11 d in the above-described embodiment. Of each lateral plate, the lateral plates 111 a, 111 d, 111 f, 111 h have relatively shorter short side lengths compared to the lateral plates 111 b, 111 c, 111 e, and 111 g.

By assembling the packaging box sheet 1 c in the same manner as described above, a tubular Hari-bako 100 c having an octagonal cross section as shown in FIG. 7B can be obtained. Here, in the same manner, by increasing or decreasing the number of lateral plates disposed between each of the lateral plates 111 a and the lateral plate 111 b, or by increasing or decreasing the length in the short side direction thereof, it is possible to realize a packaging box sheet capable of obtaining a tubular Hari-bako having various polygonal cross-sectional shapes.

Further, in the above-described embodiment, etc., various examples of packaging box sheets for obtaining tubular Hari-bakos that have no bottom plates and penetrates the inside have been illustrated, but a bottom plate may also be provided. One such modified example is shown in FIG. 8. The packaging box sheet 1 d of the modified example shown in FIG. 8 is provided with the bottom plate 11 e connected to one short side of the lateral plate 11 c, and the decorative paper 20 is provided with a fourth portion 20 e corresponding to the bottom plate 11 e. Further, the lateral plates 11 a and 11 d are each provided with a flap portion 33 on the side where the bottom plate 11 e is provided so as to project in the same direction as the bottom plate 11 e from the short side where the bottom plate 11 e is provided. An adhesive layer (not shown) is provided on the fourth portion 20 e of the decorative paper 20 and each of the flap portions 33, and a release paper 31 is provided to cover the adhesive layer. Here, as illustrated in FIG. 9, the release paper 31 provided in the fourth part 20 e and each flap portion 33 may be integrated.

The packaging box sheet 1 d of the fourth modified example has the above-described configuration, and the assembly procedure will now be described with reference to FIGS. 10A to 10C. The procedure shown below is one example, and each procedure may be interchanged as long as there is no contradiction in its assembly.

First, from a flat state of the packaging box sheet 1 d as shown in FIG. 8 or 9, each of the lateral plates 11 a, 11 b, 11 c, and 11 d is bent at approximately 90 degrees along the notch groove 13 as shown in FIG. 10A, and they are arranged so that the lateral plates 11 a to 11 d form a ring. In this state, the release paper 31 of the flap portion 21 is peeled off, then while the long sides of the lateral plate 11 a and the lateral plate 11 b are brought in contact with each other, the flap portion 21 is bonded to the outer surface of the lateral plate lib. Thereby, the lateral plates 11 a and 11 b are connected to each other, and the lateral plates 11 a to 11 d become tubular as a whole.

Next, as shown in FIG. 10B, the bottom plate 11 e is bent by approximately 90° and placed in contact with each end of each of the lateral plates 11 a, 11 b and 11 d. In this state, the release paper 31 of each flap portion 33 is peeled off, and each flap portion 33 is bonded to the outer surface of the lateral plate 11 e. Thereby, the lateral plate 11 e is connected to one end side of each of the lateral plates 11 a, 11 c, and 11 d.

Next, as shown in FIG. 10B, the second portion 20 b corresponding to the lateral plate 11 b of the decorative paper 20 and the release papers 31 and 32 corresponding to the two folding pieces 22 are peeled off, and the second portion 20 b of the decorative paper 20 is bonded to the outer surface of the lateral plate lib. In addition, one folding piece 22 on the left side in the figure is bonded to the outer surface of the bottom plate 11 e. Thereby, the lateral plate 11 e is connected to one end side of the lateral plate lib.

Then, as shown in FIG. 10C, the other folding piece 22 is folded inwardly into the lateral plate 11 b and bonded to the inner surface of the lateral plate lib, and the fourth portion 20 e of the decorative paper 20 is bonded to the outer surface of the bottom plate 11 e so as to cover each of the flap portion 33, etc. From the above, the Hari-bako with the bottom plate is completed.

Further, in the packaging box sheet of the above-described embodiment, etc., the second portion of the decorative paper was separated from the entirety of the second lateral plate. However, one part of the second portion of the decorative paper may be pre-bonded to the second lateral plate while the other part is kept separated therefrom. One such modified example is shown in FIG. 11. In the packaging box sheet 1 e of the illustrated modified example, a part of the second portion 220 b of the decorative paper 20 corresponding to the lateral plate lib, specifically the part of about ⅔ from the long side where the lateral plate 11 b and the lateral plate 11 d contact each other toward the other long side of the lateral plate lib, is pre-attached. Further, the folding sides 222 a corresponding to this portion are pre-bonded to the inside of the lateral plate 11 b, respectively. On the other hand, two folding sides 222 b are connected to the portion of the second portion 220 b which is separated from the lateral plate 11 b, and these are covered by the release papers 231 and 232. In this modified example, the release paper 231 and the release paper 232 are integrally formed. Since the part of the second portion 220 b which is separated from the lateral plate 11 b needs to cover the flap portion 21 after the flap portion 21 is bonded to the lateral plate 11 b at the time of assembly, the part is provided to have the length and width of at least roughly equal to or greater than the length and width of the flap portion 21. Since the method of assembling the modified example shown in FIG. 11 is basically the same as the method shown in FIGS. 4A to 4C, detailed description thereof will be omitted here. Since the packaging box sheet 1 e of this modified example can have more pre-bonded portions, it is possible to further reduce the misalignment of the decorative paper during assembly.

Further, in the packaging box sheet of the above-described embodiment, etc., the shape of each lateral plate has been rectangular, but the shape of each lateral plate may be trapezoidal. One such modified example is shown in FIG. 12A. In the packaging box sheet if of the modified example shown in the figure, each of the lateral plates 11 a, 11 b, 11 c, and 11 d is formed in a trapezoidal (isosceles trapezoid) shape having the same shape and size. In detail, in the illustrated example, the lateral plates 11 a, 11 b, 11 c, and 11 d are connected to each other by their upper sides and lower sides, respectively, and are connected to each other by the sides corresponding to their legs. Here, same reference numerals are given to all the configurations that share the same function as the packaging box sheet 1 shown in FIG. 1. Since the method of assembling the packaging box sheet if of this modified example is basically the same as the method shown in FIGS. 4A to 4C, detailed description thereof will be omitted here. By assembling the packaging box sheet 1 f, as shown in FIG. 12B, Hari-bako 100 f having a shape in which one opening side is greater than the other opening side can be obtained. Such Hari-bako 100 f can be provided with a lower lid or an upper lid by appropriately inserting a base paper from the greater opening side, for example.

Here, as with the modified example shown in the above-described FIG. 11, one part of the second portion of the decorative paper may be pre-bonded to the second lateral plate while the other part may be kept separated. As an example of such a case, a packaging box sheet 1 f′ is shown in FIG. 13. In FIG. 13, the same reference numerals are used for the configurations functionally common to those in FIG. 11, and the description thereof will be omitted. Further, also in the packaging box sheet if or if′, the number of lateral plates separated from the decorative paper may be increased as in the modified example shown in FIGS. 5A and 5B described above.

Further, in the packaging box sheet of the above-described embodiment, etc., basically, the shape and size of the release papers have been the same as each part of the decorative paper 20 to be covered by the release paper. However, there is no limitation on the shape etc. of the release papers as long as it is sufficient to cover the necessary portions. For example, as shown in FIG. 14A, in the packaging box sheet 1, a rectangular shaped release paper 431 a having a size sufficient to cover the second portion 20 b corresponding to the lateral plate 11 b and each folding piece 22 may be used. Similarly, as the release paper corresponding to the flap portion 21, a rectangular shaped release paper 431 b having a size sufficient to cover the portion, or a release paper 431 c having the length longer than the release paper 431 b with its length extending beyond both sides in the depth direction in reference to the flap portion 21 in the figure, may be used.

Further, for example, as shown in FIG. 14B, as the release paper to cover the second portion 20 b corresponding to the lateral plate 11 b in the packaging box sheet 1 d, a rectangular shaped release paper 531 a having a size sufficient to cover the portion, or a release paper 531 b having the length longer than the release paper 531 a and projecting toward at least one side (toward the front side in the illustrated example) in the depth direction in reference to the second portion 20 b in the figure, may be used. Similarly, as the release paper for covering the fourth portion 20 e etc. corresponding to the lateral plate 11 e, a rectangular shaped release paper 531 c having a size sufficient to cover the portion, or a release paper 531 d having the length longer than the release paper 531 c and projecting toward at least one side in the left-right direction (right side direction in the illustrated example) in the figure, may be used. In the illustrated example, by combining the release paper 531 a and the release paper 531 d or combining the release paper 531 b and the release paper 531 c, the release papers do not interfere with each other and are easy to handle. Further, likewise, as the release paper corresponding to the flap portion 21, a rectangular shaped release paper 531 e having a size sufficient to cover the portion, or a release paper 531 f having the length longer than the release paper 531 e and projecting toward at least one side (the front side in the illustrated example) in the depth direction in the figure, may be used.

Further, in the above-described embodiment and the modified examples, cases have been exemplified where the lateral plates are directly bonded to each other at the locations where the lateral plates are connected to each other. However, the two plates may be connected to each other without being directly bonded to each other but connected by the decorative paper attached over the two plates.

DESCRIPTION OF THE REFERENCE NUMERALS

-   -   1: Packaging box sheet     -   10:Base paper     -   11 a, 11 b, 11 c, 11 d:Lateral plate     -   13:Notch groove     -   20:Decorative paper     -   20 a:First portion     -   20 b:Second portion     -   21:Flap portion     -   22:Folding piece 30:Adhesive layer 31, 32:Release paper 

1. A packaging box sheet assembled to obtain a Hari-bako comprising: a sheet-like base paper; and a decorative paper disposed on an outer surface of the base paper; wherein the base paper comprises: a first lateral plate and a second lateral plate each of which has an outer edge each having a quadrangular shape in a plan view; and at least a third lateral plate which has an outer edge having a quadrangular shape in a plan view and which is disposed between the first lateral plate and the second lateral plate; wherein the decorative paper comprises: a first portion which is pre-bonded to the first lateral plate and the third lateral plate; a second portion which corresponds to the second lateral plate, is continuous with the first portion, and has at least a part that is separated from the second lateral plate without being bonded thereto; and a flap portion which is continuous with the first portion and which is provided so as to be projected from the first portion to a side opposite to the second portion; and wherein at least the part of the second portion and the flap portion each comprises: an adhesive layer; and a release paper which covers the adhesive layer.
 2. The packaging box sheet according to claim 1, wherein the whole part of the second portion is separated from and not bonded to the second lateral plate; and wherein the whole part of the second portion has the adhesive layer and the release paper.
 3. The packaging box sheet according to claim 1, wherein each of the first the lateral plate, the second lateral plate, and the third lateral plate has a rectangular shape in a plan view.
 4. The packaging box sheet according to claim 1, wherein each of the first the lateral plate, the second lateral plate, and the third lateral plate has an isosceles trapezoidal shape in a plan view.
 5. The packaging box sheet according to claim 1, wherein the flap portion of the decorative paper is configured to connect the first lateral plate and the second lateral plate, by peeling off the release paper, bringing the adhesive layer into contact with the second lateral plate, and bonding the flap portion to the second lateral plate.
 6. The packaging box sheet according to claim 5, wherein at least the part of the second portion of the decorative paper is configured to cover the flap portion after the flap portion is bonded to the second lateral plate, and to bond to the second lateral plate.
 7. The packaging box sheet according to claim 1, wherein the base paper further comprises a rectangular bottom plate arranged adjacent to one of the four sides of the third lateral plate that is adjacent to neither the first the lateral plate nor the second lateral plate, wherein the decorative paper further comprises a fourth portion which corresponds to the bottom plate, is separated from and not bonded to the bottom plate, and is connected to the first portion, wherein the fourth portion of the decorative paper comprises: an adhesive layer; and a release paper which covers the adhesive layer.
 8. The packaging box sheet according to claim 2, wherein the base paper further comprises a rectangular bottom plate arranged adjacent to one of the four sides of the third lateral plate that is adjacent to neither the first the lateral plate nor the second lateral plate, wherein the decorative paper further comprises a fourth portion which corresponds to the bottom plate, is separated from and not bonded to the bottom plate, and is connected to the first portion, wherein the fourth portion of the decorative paper comprises: an adhesive layer; and a release paper which covers the adhesive layer.
 9. The packaging box sheet according to claim 3, wherein the base paper further comprises a rectangular bottom plate arranged adjacent to one of the four sides of the third lateral plate that is adjacent to neither the first the lateral plate nor the second lateral plate, wherein the decorative paper further comprises a fourth portion which corresponds to the bottom plate, is separated from and not bonded to the bottom plate, and is connected to the first portion, wherein the fourth portion of the decorative paper comprises: an adhesive layer; and a release paper which covers the adhesive layer.
 10. The packaging box sheet according to claim 4, wherein the base paper further comprises a rectangular bottom plate arranged adjacent to one of the four sides of the third lateral plate that is adjacent to neither the first the lateral plate nor the second lateral plate, wherein the decorative paper further comprises a fourth portion which corresponds to the bottom plate, is separated from and not bonded to the bottom plate, and is connected to the first portion, wherein the fourth portion of the decorative paper comprises: an adhesive layer; and a release paper which covers the adhesive layer.
 11. The packaging box sheet according to claim 5, wherein the base paper further comprises a rectangular bottom plate arranged adjacent to one of the four sides of the third lateral plate that is adjacent to neither the first the lateral plate nor the second lateral plate, wherein the decorative paper further comprises a fourth portion which corresponds to the bottom plate, is separated from and not bonded to the bottom plate, and is connected to the first portion, wherein the fourth portion of the decorative paper comprises: an adhesive layer; and a release paper which covers the adhesive layer.
 12. The packaging box sheet according to claim 6, wherein the base paper further comprises a rectangular bottom plate arranged adjacent to one of the four sides of the third lateral plate that is adjacent to neither the first the lateral plate nor the second lateral plate, wherein the decorative paper further comprises a fourth portion which corresponds to the bottom plate, is separated from and not bonded to the bottom plate, and is connected to the first portion, wherein the fourth portion of the decorative paper comprises: an adhesive layer; and a release paper which covers the adhesive layer. 